part L*j I.IMKSroNK of TMK I.KKKSTKHsIIIRK lOAI-KIKI.l). S5 



The Survey Memoir i^'ivcs two <liai(r.iins of iiM{i(>rtnn»f j>|». 1"> 

 & 17] in eoimexioii witli tlif present jjaper: — 



(i) Sketcli of stratii seen in the tiiuirry at (irace Dieu. The place in now 

 so overgrown that the se<iuenee and rehition of the .strata are oliseured. 



(ii) ' Section across Stanton Harold and Heath End,' showing tlie Millstone 

 Grit conformable with the Shales below. 



Tlie (listriet was re-surveyed l>y ('. Fox-Strangways in lS9s, 

 and his resdlts were ])ublislu'd in the Memoir of LJK)5J In tliis 

 Memoir is pul)lishe<l a list of tVjssils obtained from three of the 

 inhers: namely, Tieknall, Breedon-on-the- Hill, and Hreedon (Moud. 

 The mati-rial from which this list was compiled is for the greati-r 

 part in the collection at Hepton School. In addition to the list 

 of fossils, a few notes of a general character arc given concerning 

 the Carboniferous Limestone. 



In a later Memoir- by the same author, the account of the 

 Lower Carboniferous is much tlie same as that given in the liK)') 

 Memoir, but at the end of the list of the fossils from Tieknall. 

 Hreedon, and Breedon Cloud j). 15], occur the words: 'The aboxc 

 assemblage gives definite indications of the presence of the Dihuno- 

 j>hi/lliini Zone.' Since 1JK)7 nothing has Ix'en juddished concern- 

 ing the ])ala'ontology and zoning of the Carboniferous Limestone 

 of the district. 



Two factors have made the study of the Carboniferous Lime- 

 stone north of Ashby a matter of eonsiderable ditticulty : ( I ) The 

 oUl lime-works at Tieknall and the exjK)surcs in Calkc Park have 

 ]»resented unusual dilliculty, as permission to examine them has 

 always been r^*fuse<l. My own examination of this relatively 

 small area has been delayed considenibly, but 1 am jdcased to say 

 that all of the exj)osures have now been examined. 



(2) The iidiers farther ea.st, which I have been at liberty to 

 examine, thanks to the eoui-tesy of Mr. .1. (J. Shields, of I slay 

 Walton, are coni])osed of almost barren dolomites. Hreedon-on- 

 the-Hill and Osgathorpe are particularly barren. Hree«lon CUuul 

 is not nnu'h better in this resjiect, but I have received great hel|) 

 in dealing with the fauna of this inlier from Mr. \{. WcmhI, of 

 Mellxturne. who has jdaced at my disposjil the tine eidlcction of 

 sj)ecimcns that he has gradually accunndated in the ((tinse of 

 observations extending ()vcr many years. 



As a result of correspondence with Mr. ii. (l. Carruthers, 

 Mr. ,\. i;. Horwood,and the late hr. Arthur VauLrhan. I In-gjin an 

 examination of the area during the summer of llML*. Since then 

 the work has jtrocecded slowU, on aeco\nd of the ilitHculties 



I'UCOUntered. 



Although this papi-r di-al.^ ni(»re particularly with the faimal 

 assend>lages of the Carbouiferous Limestone of the district, certain 

 ([Uestions of pctroloj^ical interest, such as dolomiti/ation, ha\e 

 i-eceive<l attention. 



' ' Tiu' lu'oldjry of thet'ojintrv bftween Derby. Biirton-on-Trent. A>hby-de- 

 la-Zoiu'h. \ LonjfhboroJijfh ' Mem. <Jeo|. Surv. 11M)."». 



' • The < u'cdoffy of the L«'i.-».>;tei>liin' \ South D.-rbyshin' CualHold " Mem 

 (ieol. Snrv. U»07. 



